eubank forced degale to take to his knees in the 2nd round of the fight!
Chris Eubank Jr handled the greatest success of his profession to leave James DeGale's future to be determined with a consistent focuses triumph at London's O2 Arena.
In a challenge which attempted to discover a stream, Eubank Jr constrained a tally in cycle two after a stinging left snare.
Two-time title holder DeGale boxed likely from range yet paid in the tenth when a short proximity left snare sent him reeling and constrained another check.
DeGale never undermined a stoppage and the cards read 114-112 115-112 117-109.
"I'm back where I need to be - at the top of the food chain and now I'm coming for all the other belts in the super-middleweight division," Eubank Jr, 29, announced.
DeGale, 33, held his hand aloft as the scores were read yet he was well beaten by his kindred Englishman and, having stated he would likely retire if he lost, his future in the ring is uncertain.
"I'm going to go back, talk to my team and talk to my family," he said. "I've been to the heights of boxing, I've won an Olympic gold medal, won the world title twice, made history and I've boxed the best around the world. I've left my mark in boxing."
The 2008 Olympic champion indicated swift movement in patches yet his single shots from range were overwhelmed by flurries of activity from Eubank Jr.
In truth, DeGale indicated guts to attempt to keep his feet after left connects opened him in the second and tenth, and he somehow stayed upright again after another left snare in the final round.
The margin of victory even accounted for a point deduction Eubank Jr was handed in the eleventh round when, not long after landing a devastating uppercut, he picked his rival up on his shoulder in a grapple and tossed him to the canvas.
In his first challenge under the guidance of trainer Nate Vasquez, Eubank Jr demonstrated more patience than in previous elite-level fixtures and, aside from a brief respite around the midway point, always looked the more dangerous of the two.
The Brighton fighter answered criticism in performing under strain having been presented in defeats to George Groves and Billy Joe Saunders.
He insisted he had "made a statement", while his father - former two-weight world champion Chris Eubank Sr - said he was "ecstatic" having said he was "not convinced" his child would win in the build-up.